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Mathematical modeling of the formation and development of channel microforms
Conclusions 1. The accuracy of modeling the velocity field depends heavily on the orthogonality of the grid being generated. Deviation from orthogonality even by 10° increases the ductility of the scheme markedly. 2. It is necessary to relate bottom erosion not only to the tangential stresses on the bottom, but also the distribution of the kinetic energy of turbulence along the bottom. 3. In studying channel deformations, a diffusion model with a terminal velocity is most effective, among other things, because it does not include difficult-to-determine diffusion coefficients that enter into a semi-empirical model. 4. It is better to establish the “adhesion” condition, and not the “reflection” condition on the bottom for descending particles — this perceptibly changes the velocity of the bottom forms and their transformation. 5. A change of ±50% in the transfer frequencies ωik that enter into the diffusion model has virtually no effect on the computed deformation of the bottom.
Mathematical modeling of the formation and development of channel microforms
Conclusions 1. The accuracy of modeling the velocity field depends heavily on the orthogonality of the grid being generated. Deviation from orthogonality even by 10° increases the ductility of the scheme markedly. 2. It is necessary to relate bottom erosion not only to the tangential stresses on the bottom, but also the distribution of the kinetic energy of turbulence along the bottom. 3. In studying channel deformations, a diffusion model with a terminal velocity is most effective, among other things, because it does not include difficult-to-determine diffusion coefficients that enter into a semi-empirical model. 4. It is better to establish the “adhesion” condition, and not the “reflection” condition on the bottom for descending particles — this perceptibly changes the velocity of the bottom forms and their transformation. 5. A change of ±50% in the transfer frequencies ωik that enter into the diffusion model has virtually no effect on the computed deformation of the bottom.
Mathematical modeling of the formation and development of channel microforms
Girgidov, A. D. (author) / Prokof'ev, V. A. (author)
Hydrotechnical Construction ; 24 ; 722-727
1990-11-01
6 pages
Article (Journal)
Electronic Resource
English
Mathematical modeling of the formation and development of channel microforms
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